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xz_007 [3.2K]
3 years ago
9

X^3-x^2=30 what are both x's

Mathematics
1 answer:
Mnenie [13.5K]3 years ago
8 0

Step-by-step explanation:

my favourite beatbox is joker

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3 years ago
Suppose that we will randomly select a sample of 106 measurements from a population having a mean equal to 19 and a standard dev
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Answer:

z =\frac{18.45-19}{\frac{7}{\sqrt{106}}}= -0.809

And if we use the normal standard distribution or excel we got:

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Step-by-step explanation:

For this case we have the following info given:

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\sigma = 7 represent the standard deviation

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The distribution for the sample size if we use the central limit theorem (n>30) is given by:

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And for this case we want to find the following probability:

P(\bar X< 18.45)

And for this case we can use the z score formula given by:

z =\frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}

And replacing we got:

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And if we use the normal standard distribution or excel we got:

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4 0
3 years ago
Standard form of 40+2+.3+.08
yan [13]

40 + 2 = 42 \\ .3 + .08 = .38 \\ .38 + 42 = 42.38
7 0
3 years ago
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